水地22个点试验结果表明,亩施碳铵100斤或尿素40斤,一次深施的比播(1/3)、返(1/3)、拨(1/3)分次施增产7.4-39.2％,平均为17％,其中亩增穗2.69万,每穗增粒0.77个,千粒重增加0.93克,亩增产小麦80.23斤;旱地10个点试验结果表明,一次深施的比分次施的增产12.7-183.5％,平均增产30％,每亩增产小麦70斤。可见,氮肥一次深施是一项提高小麦产量的有效措施,1980年陕西全省推广27.3万亩,1981年已超过 Water 22 points test results show that 100 acres of ammonium bicarbonate or 40 pounds of urea, a sowing than sowing (1/3), return (1/3), dial (1/3) -39.2%, an average of 17%, of which 26,700 acres per ear increased by 0.77 per panicle grain, grain weight increased 0.93 grams, 80.23 kg of mu yield wheat; dry land 10 points test results show that a deep application of the score An increase of 12.7-183.5%, with an average yield of 30%, an increase of 70 kg of wheat per mu. Visible, nitrogen fertilizer is a deep application of an effective measure to increase wheat production in Shaanxi Province in 1980 to promote 27.3 hectares, 1981 has more than